Which of the following oxides has a three-dimensional structure ?

Options

A. ` CO`
B. `CO_2`
C. `SiO_2`
D. `SO_2`

Answer

To determine which of the given oxides has a three-dimensional structure, we will analyze each oxide based on its molecular geometry.

### Step-by-Step Solution:

1. **Identify the Oxides**: The oxides given in the question are:
- Carbon monoxide (CO)
- Carbon dioxide (CO₂)
- Silicon dioxide (SiO₂)
- Sulfur dioxide (SO₂)

2. **Analyze Carbon Monoxide (CO)**:
- Carbon monoxide is a diatomic molecule with a linear structure.
- The bond angle is 180 degrees, indicating it does not have a three-dimensional structure.

3. **Analyze Carbon Dioxide (CO₂)**:
- Carbon dioxide also has a linear structure with a bond angle of 180 degrees.
- Like carbon monoxide, it does not exhibit a three-dimensional structure.

4. **Analyze Silicon Dioxide (SiO₂)**:
- Silicon dioxide has a three-dimensional network structure.
- It consists of silicon atoms bonded to oxygen atoms in a tetrahedral arrangement, resulting from sp³ hybridization.
- This tetrahedral arrangement leads to a three-dimensional structure.

5. **Analyze Sulfur Dioxide (SO₂)**:
- Sulfur dioxide has a bent molecular shape due to the presence of a lone pair on the sulfur atom.
- This bent shape indicates that it is a two-dimensional structure.

6. **Conclusion**:
- Among the oxides analyzed, only silicon dioxide (SiO₂) has a three-dimensional structure.

### Final Answer:
The oxide with a three-dimensional structure is **Silicon Dioxide (SiO₂)**.

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